$\lim_{x\to1}\left(\frac{x^{25}-1}{x^{13}-1}\right)$
$n^2-9n+20.25$
$8\:-\:9\:+\:4\:-\:3\:-\:5$
$\frac{dv}{dt}=50$
$\sec\:^{\left(2\right)}x-\sec\:^{\left(2\right)}y=\tan\:^{\left(2\right)}x-\tan\:^{\left(2\right)}y$
$\int\left(\sqrt{12\cdot x^2-1}\right)$
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